contrariant

from The Collaborative International Dictionary of English v.0.48

Contrariant \Con*tra"ri*ant\, a. [LL. contrarians, p. pr. of
   contrariare to oppose, fr. L. contrarius: cf. F. contrariant,
   p. pr. of contrarier to contradict. See {Contrary}.]
   Contrary; opposed; antagonistic; inconsistent; contradictory.
   [R.]
   [1913 Webster]

         The struggles of contrariant factions.   --Coleridge.
   [1913 Webster]